Leon has a pretty boy personality and sharp tongue, but he is an honest man that tells no lies. Leon has a nihilistic side, claiming he has desired to die in battle during his death quote in Gaiden.

In both versions of the game, Leon has a very close relationship to Valbar, describing him as his sworn brother and saying he will go wherever Valbar goes. In the remake, it is made clear Leon's attachment to Valbar is romantic, with Leon saying that women do not interest him and Valbar is all he needs, even if Valbar never notices Leon's love for him.

He also mistakenly thinks that Kamui is hitting on him in their support conversations, declining him while, at the same time, talking about Valbar being his ideal man. In his third base conversation with Celica, even she recognizes that his feelings for Valbar are romantic.